rGO Composites Research Articles

Bandgap engineered g-C3N4 and its graphene composites for stable photoreduction of CO2 to methanol

Carbon nitride (g-C3N4) is a two-dimensional material with several advantages over other photocatalysts, such as metal-free, biocompatible, chemically and thermally stable, to name a few. However, it usually suffers from low charge carrier mobility, high recombination rate, low electrical conductivity, and, more importantly, low absorption in the visible range. To address the multiple shortcomings, a simple and cost-effective copolymerization strategy was developed to synthesize g-C3N4 by selecting the appropriate precursors and optimizing the synthesis parameters, which resulted in lowering the bandgap from 2.80 eV to as narrow as 2.40 eV. To further improve the charge separation and conductivity, g-C3N4 and reduced graphene oxide (rGO) based composites were synthesized. The obtained composite catalysts were studied for photocatalytic CO2 reduction. It is important to note that g-C3N4/rGO composites resulted in the selective photoreduction of CO2 to methanol as the only liquid product with evolution rates of ∼114 μmol g−1 h−1 along with H2 (68 μmol g−1 h−1) under scavenger free conditions and exhibited robust stability.

Scalable fabrication of NiCo2O4/reduced graphene oxide composites by ultrasonic spray as binder-free electrodes for supercapacitors with ultralong lifetime

• NiCo 2 O 4 /rGO nanocomposites with hierarchical and laminated structure was fabricated by one-step ultrasonic spray. • In-situ grown NiCo 2 O 4 nanoparticles act as spacers to prevent re-stacking of graphene. • Tight adhesion between active materials and Ni foam guarantees efficient electron transfer and alleviate peeling of active materials. • NiCo 2 O 4 /rGO composite exhibits a high specific capacitance and excellent cycling stability. • The assembled asymmetric supercapacitor manifests an ultralong cycling lifetime up to 30,000 cycles. Durable and cost-effective electrode materials are essential for practical application of supercapacitors. Herein, large area NiCo 2 O 4 /reduced graphene oxide (NiCo 2 O 4 /rGO) composites with hierarchical structure were fabricated by a facile one-step ultrasonic spray on Ni foam and directly used as the binder-free electrodes for supercapacitors in aqueous KOH electrolyte. Owing to high electrical conductivity of rGO, hierarchical and layered structure of the electrode, as well as tight adhesion of active materials on the current collector, the as-obtained hybrid electrodes show a high specific capacitance of 871 F g −1 at current density of 1 A g −1 , good rate performance and remarkable cycling stability with a capacitance retention of 134% after 30000 cycles. Besides, the assembled NiCo 2 O 4 /rGO//AC asymmetric supercapacitor (ASC) displays the maximum energy density of 29.3 Wh kg −1 at a power density of 790.8 W kg −1 . Significantly, an ultralong cycling life of 102% capacitance retention is achieved for the ASC device after 30,000 charge/discharge cycles at 20 A g −1 . The scalable fabrication route and excellent electrochemical performance of the NiCo 2 O 4 /rGO composites open the door for making novel hybrid electrodes of advanced supercapacitors.

Facile synthesis of a novel photocatalyst with integrated features for industrial effluents treatment

Faster charge transport, excellent charge separation, narrow bandgap energy, lower electron-hole pair recombination rate, and high visible light absorption are the key features of an ideal photocatalyst material. Undoubtedly, semiconductor-based photocatalysts having remarkable charge separation efficiency have attracted considerable attention for degrading hazardous organic pollutants from contaminated water. So herein, a novel composite of reduced graphene oxide (rGO) supported by gadolinium doped bismuth yttrium oxide (Gd-BiYO3/rGO) was prepared by simple precipitation and ultrasonication method. The photocatalytic efficiency of the Gd-BiYO3/rGO composite was examined comparatively with pure BiYO3 and Gd-BiYO3 samples to degrade Methylene Blue (MB) dye under visible light irradiation. The Gd doping and rGO incorporation into BiYO3 increased the conductivity, improved the charge transfer efficiency, and impeded the charge recombination, resulting in superior photocatalytic activity of Gd-BiYO3/rGO. The kinetic studies exhibited the 96.2%, 61.5%, and 48.3% degradation of MB after 80 min irradiation of 1 SUN visible light under Gd-BiYO3/rGO, Gd-BiYO3, and BiYO3, respectively. The Gd-BiYO3/rGO composite degraded the MB dye at a rate (k = 0.0328 min-1) that is 5.05 and 2.68-fold higher than pure BiYO3 and Gd-BiYO3, correspondingly. The transient photocurrent response of Gd-BiYO3/rGO was comparatively 4.7 and 2.8 times greater than that of BiYO3 and Gd-BiYO3 photocatalysts, respectively. The dominant photocatalytic performance of Gd-BiYO3/rGO is primarily ascribed to the formation of heterojunctions between rGO nanosheets and Gd-BiYO3, which facilitate higher visible light absorbance, effective charge separation, and transfer through interfacial layers, more dye adsorption, lower charge transfer resistance, and hamper electron-hole pair recombination. Overall, the electrochemical results suggest that the current study provides an effective way to synthesize a heterostructure photocatalyst for removing organic pollutants from industrial effluents.

Aluminum-ion intercalation and reduced graphene oxide wrapping enable the electrochemical properties of hydrated V2O5 for Zn-ion storage

Aqueous zinc-ion batteries (AZIBs) have the characteristics of high theoretical specific capacity, wide source and high safety, and become a very promising energy storage equipment. Due to the larger solvation radius and stronger electrostatic interaction of divalent zinc ions, the cathode materials need to have larger space and more stable structure. The ions or molecules are pre-inserted between the vanadium oxide layers as pillars, which can provide large layer spacing and facilitate the insertion/extraction process and diffusion of zinc ions, but their performance is limited due to their low conductivity and solubility. By combining it with carbon materials with high conductivity and strong chemical stability, it can make up for these shortcomings and greatly improve the electrochemical performance. Herein, aluminum-ion intercalated hydrated V2O5 (AlxV2O5·nH2O, abbreviated as AlVOH)/reduced graphene oxide (AlVOH/rGO) composite was synthesized by a one-step hydrothermal method to improve the Zn ion storage properties of hydrated V2O5 (VOH). The composite material has a large layer spacing of 13.3 Å, and the composite of rGO not only enhances its electrical conductivity, but also protects the electrode active material to a certain extent. As expected, AlVOH/rGO has good cycle stability and rate performance, which shows a specific capacity of 405 mA h·g−1 at 0.1 A·g−1 and has no significant energy attenuation after 100 cycles.

Preparation and Electromagnetic Properties of Spinel Doped Copper / Rgo Composites

Preparation and Electromagnetic Properties of Spinel Doped Copper / Rgo Composites

Effect of rGO with BaCuO3 perovskite on the thermal decomposition of AP and NTO

In this study, the syntheses of a BaCuO3 perovskite-structured oxide and rGO were conducted using a sol–gel method and ultrasonication process, respectively. Their physico-chemical characteristics were studied by powder X-ray diffraction (PXRD), Raman spectroscopy, and ultraviolet-visible (UV-vis) spectroscopy analyses. The perovskite type particles were found to present as a cubic crystal system with a crystal size in the range of 10–60 nm. Their catalytic performance was investigated using differential thermal analysis (DTA) measurements at varying heating rates via the thermal decomposition of ammonium perchlorate (AP) and 3-nitro-1,2,4-triazol-5-one (NTO). The kinetics and thermodynamics parameters, such as the average activation energy, pre-exponential factor, entropy, and Gibbs free energy, were also investigated, which showed a decrease in the decomposition peak temperature of AP and NTO in the presence of the catalysts rGO, BaCuO3, and rGO + BaCuO3 compared to pure AP and NTO.

Molecularly Imprinted Polymer Functionalized on Reduced Graphene Oxide Electrochemical Sensor for Detection of Ciprofloxacin

Ciprofloxacin (CIP) is widely utilised to treat bacterial infections. Currently, CIP is present in water sources at higher concentrations, thus necessitating close monitoring. This study developed electrochemical nano-sensors based on molecularly imprinted polymer (MIP) and reduced graphene oxide (rGO) composites to detect CIP. rGO served as the loading platform for MIP immobilisation on a glassy carbon electrode (GCE). A copolymer thin film, comprised of polyaniline copolymerized with o-phenylenediamine (PAni-co-PDA) was obtained by electro-polymerisation utilizing cyclic voltammetry (CV) under suitable conditions. The performance of the modified GCE was examined utilizing CV mode in a hexacyanoferrate electrolyte as an electrochemical probe. The PAni-co-PDA/rGO-modified GCE exhibited enhanced improvement and efficient electrocatalytic behaviour in the oxidation of CIP with relatively high sensitivity and stability. The sensor was operated in differential pulse voltammetry (DPV) mode. Our best results revealed good linearity response to CIP in the range of 0.001–10.0 μM with an R-squared of 0.949, a detection limit of 0.09 μM (3.3 SD/S), and the calibration plot of ΔI minus the logarithm of the CIP concentration exhibited a sensitivity of –1.521. The sensor demonstrated a conductive polymer-based device that can be utilised for rapid CIP determination in pharmaceutical samples and biological fluids.

Explosion in the preparation of nanoparticles: monodisperse Ag inserted in 3D graphene sheets for the electrochemical detection of H2O2.

In this work, the smashing effect of explosives innovatively led to the preparation of nanoparticles. The energetic material 3,5-dinitrobenzoic acid (DNBA) was introduced as a ligand to coordinate with silver ions and connect graphene sheets via electrostatic attraction in the sol-gel process. Owing to the thermolysis of DNBA, the pore-formation of graphene sheets, thermal reduction of Ag+ and achievement of monodisperse Ag nanoparticles were realized simultaneously. The morphology and composition of the nanocomposites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Then, the nanocomposite was used to construct a hydrogen peroxide (H2O2) sensor, which displayed excellent catalytic performance over a wide linear concentration range of 4 × 10-5 to 4 × 10-3 mM with a corresponding sensitivity of 72 μA mM-1 cm-2 and detection limit of 101.25 nM with a signal-to-noise ratio of 3.

Preparation of CoFe@N-doped C/rGO composites derived from CoFe Prussian blue analogues for efficient microwave absorption

At present, in order to solve the problem of microwave radiation and interference, it is urgent to study high performance microwave absorption (MA) materials with strong absorption ability, light weight, thin thickness and broad bandwidth. In this work, CoFe@nitrogen-doped carbon/rGO (CoFe@NC/rGO) composites derived from CoFe Prussian blue analogues were successfully prepared by in situ growth and annealing. And the effects of GO content on the MA performances of the composites were studied systematically. Results reveal that MA properties of CoFe@NC/rGO composites are enhanced by introduction of GO, this is mainly because the addition of GO can provide large specific surface area for microwave reflection, enhance interfacial polarization and compensate the insufficient dielectric loss. Moreover, impedance matching, conduction loss and attenuation ability are also improved obviously. CoFe@NC/rGO composites show outstanding MA capability, and the minimum reflection loss is up to −53.0 dB at a thickness of 2.4 mm, the largest effective absorption bandwidth can achieve 4.48 GHz at a thin thickness of 1.7 mm. In consideration of the superior MA performances, the CoFe@NC/rGO composites will be ideal candidates for high-efficient MA applications.

A facile one-pot microwave assisted hydrothermal synthesis of hierarchical cobalt oxide/reduced graphene oxide composite electrode for high-performance supercapacitors

The composites composed of transition metal oxide and carbonaceous nanomaterials have been regarded as one of the promising electrode materials for high performance supercapacitors. How to develop effective hybridization of two components to deliver synergistic effect on electrochemical performance is a key question to be tackled. Herein, we successfully prepare three-dimensional hierarchical cobalt oxide (Co3O4)/reduced graphene oxide (rGO) composites via a facile, rapid and cost-effective one-pot microwave assisted hydrothermal process. The effects of rGO content on morphology, chemical and crystalline structure, electrode performance are systematically investigated. Interestingly, it is noticed that by changing the addition of graphene oxide (GO), the size of Co3O4 nanoparticles can be effectively controlled, which has a significant effect on the electrochemical properties of electrode materials. The as-prepared Co3O4/rGO with 23 wt% rGO exhibits an outstanding specific capacitance of 1031 F g−1 at 1 A g−1 and retains 78% of capacitance when current density increased to 10 A g−1, revealing that Co3O4/rGO composites prepared by this facile process can be an ideal candidate electrode for high performance supercapacitors.

Copper Oxide Nanorod/Reduced Graphene Oxide Composites for NH3 Sensing

The NH3 sensing performance of copper oxide (CuO) nanorods can be enhanced with reduced graphene oxide (rGO) composites (i.e., CuO:rGO) due to their favorable Fermi level alignments and improved carrier mobility. However, the conductivity and the active sites in CuO:rGO are highly determined by the preparation techniques. Hence, we attempt to unravel the role of different chemical routes (wet chemical synthesis and hydrothermal preparation techniques) on the NH3 sensor device performance of CuO:rGO. Morphological imaging reveals the formation of 1D structures in both preparation techniques, and the role of graphene oxide on the evolution of CuO nanorods is discussed. First-principles calculations probe the interactions between CuO:rGO and NH3, and the structure is optimized for the most stable configuration. The absorption binding energies of the CuO:rGO–NH3 systems are measured to be 1.36 eV, which is much higher than those of the metal–rGO composites. For 50 ppm of NH3, the sensor response is measured to be 3.87 and 6.29 for chemically and hydrothermally synthesized CuO:rGO, respectively. The enhanced response of hydrothermal CuO:rGO is due to the more active sites induced on the CuO nanorod surface by rGO and the favorable band bending at the rGO–CuO interface.

Effects of SiC on the microstructures and mechanical properties of B4C–SiC–rGO composites prepared using spark plasma sintering

In this study, B4C–SiC–rGO composites with different SiC contents were prepared by spark plasma sintering at 1800 °C for 5 min under a uniaxial pressure of 50 MPa. The effects of SiC on the microstructures and mechanical properties of the B4C–SiC–rGO composites were investigated. The optimal values for flexural strength (545.25 ± 23 MPa) and fracture toughness (5.72 ± 0.13 MPa·m1/2) were obtained simultaneously when 15 wt.% SiC was added to 5 wt.%–GO reinforced B4C composites (BS15G5). It was found that SiC and rGO inhibited the grain growth of B4C and improved the mechanical properties of the B4C–SiC–rGO composites. The clear and narrow grain boundaries of rGO–B4C and rGO–SiC, as well as the semi-coherent B4C–SiC interface, indicated strong interface compatibility. The twin structures of SiC and B4C observed in the composites improved their fracture toughness. Crack deflection and crack bridging caused by the SiC grains as well as rGO bridging and rGO pull-out were observed on the crack propagation path.

Global popularization of CuNiO2 and their rGO nanocomposite loveabled to the photocatalytic properties of methylene blue

New advancements of photocatalytic activity with higher efficiency, low price are most important, which is challenging in industrialized and many fields. We have introduced CuNiO2 and CuNiO2/rGO nanocomposite was generally prepared by the hydrothermal treatment and tested to the photocatalytic studies. Photocatalytic measurements of CuNiO2 with different weight percentages CuNiO2/rGO (25/75), (50/50), and (75/25) are achieved to the efficiency under visible light, in this case, CuNiO2/rGO (50/50) composite have the highest performance is scrutinized. This was obeyed for a synergistic effect between CuNiO2 nanoparticles and rGO composites. Furthermore, the CuNiO2, CuNiO2/rGO (25/75), (50/50), and (75/25) nanocomposite were tested by several analyses like XRD, FT-IR, DRS UV Visible spectroscopy, Raman spectroscopy, and FESEM & HRTEM investigations. In this regard all measurements are very clear and satisfied; therefore we are encouraged for future developing environmental applications.

Radical polymer grafted graphene for high-performance Li+/Na+ organic cathodes

Covalently grafting redox-active polymer to graphene sheets is a practical approach for developing high-performance organic cathode materials. Here, we report a facile preparation of radical polymer poly(2,2,6,6-tetramethylpiperidin-1-oxyl-4-yl methacrylate) (PTMA) grafted graphene sheets (rGO) composites (rGO- g -PTMA) with various PTMA contents via one-step radical polymerization, and their applications as cathodes for Li-ion/Na-ion batteries. The energy storage capacity of rGO- g -PTMA is determined by the relative contribution from the battery-type redox reaction of PTMA and the pseudocapacitive behavior of rGO sheets. The optimized rGO- g -PTMA 50 composite with 50 wt% of PTMA shows excellent energy storage performance, which is almost two times higher than that of the physically blended rGO/PTMA 50 owing to reduced solubility of PTMA in electrolyte solution and improved electrical conductivity. As cathode materials for Li-ion/Na-ion batteries, rGO- g -PTMA 50 shows superior performance including high capacity, good cycling and rate stability. Hence, this covalently bonded radical polymers on graphene provide new option for developing high-performance organic cathode materials for Li-ion/Na-ion batteries. • Covalent grafting radical polymer on rGO via free radical polymerization. • The optimized content of PTMA in rGO- g -PTMA is determined. • Both PTMA and rGO contributed to the energy storage capacity. • rGO- g -PTMA applied as cathodes for Li + /Na + batteries.

A room-temperature chemiresistive NO2 sensor based on one-step synthesized SnO2 nanospheres functionalized with Pd nanoparticles and rGO nanosheets

A high-performance and cost-effective NO2 gas sensor operating at room temperature was realized from synthesized SnO2 nanospheres functionalized with Pd nanoparticles and rGO nanosheets (Pd-SnO2/rGO) by a facile one-step hydrothermal route. The as-synthesized materials were characterized by SEM, TEM, XRD, Raman, XPS, TGA and BET techniques. The Pd-SnO2/rGO composites have unique porous structure, large specific surface area and good thermal stability, as well as abundant oxygen vacancies on material surface. Importantly, the obtained gas-sensing results indicate that the optimal response of the Pd-SnO2/rGO sensor to 100 ppm NO2 gas at room temperature is 7.92 with the response/recovery times of 56.9/22.1 s, and the response/recovery times to 10 ppm NO2 gas are 54.3/24.2 s with the theoretical detection limit of 37.8 ppb, ensuring the real-time detection at relative low concentration of NO2 gas. The Pd-SnO2/rGO sensor performs better than other sensors (including SnO2, Pd-SnO2 and SnO2/rGO sensors) in response and response/recovery times. Besides, our sensor exhibits excellent repeatability, high selectivity for NO2 gas relative to other gases and long-term stability. The enhanced performance of the Pd-SnO2/rGO sensor to trace NO2 gas may benefit from the unique porous structure and large specific surface area, which can provide rich active centers for redox reaction. Also, hybrid heterostructure between SnO2 and rGO can provide more channels for electron transfer, and thus increase the free electron. Catalytic effects of Pd nanoparticles help to produce more oxygen vacancies and chemisorbed oxygen for accelerating the process in redox reaction. It is speculated that our work will provide a superior strategy for realizing ppb-level NO2 gas sensor at room temperature.

Improved thermal conductivity of poly(dimethylsiloxane) composites filled with well-aligned hybrid filler network of boron nitride and graphene oxide

Polymer composites have attracted considerable attention due to their easy processability, low cost, and various applications. However, intrinsic poor thermal, electrical properties of polymer always have been the bottlenecks of multifunctional technical development. In this study, fabrication of low dielectric loss and highly thermal conductive composites was investigated through hybridization of silane-treated reduced graphene oxide (rGO) and boron nitride (BN), sintering of silver nanoparticles (AgNPs) on the surface of two-dimensional fillers, and infiltration of poly(dimethylsiloxane) (PDMS). The well-ordered filler structure was achieved by aligned BN on the rGO surface. The aligned PDMS/BNA-SrGOA composites, which form heat transfer paths along the filler orientation of two-dimensional BN and GO, exhibited high thermal conductivities of 10.91 and 1.27 W/mK according to in-plane and through-plane direction in a 1:2 ratio of BN and rGO. In addition, the dielectric loss was decreased by interaction with BN compared to that with only the rGO composites. Finally, the treatment of a silane coupling agent on the rGO surface reduced the interface resistivity between the filler and matrix, which reinforced the thermal, electrical, mechanical properties.

Distinct response patterns of bacterial communities in Ag- and ZnO-rGO nanocomposite-amended silt loam soils

The widespread application of metal-based nanoparticle (MNPs)/reduced graphene oxide (rGO) composites inevitably leads to their release into soils. However, we lack a detailed understanding of the bacterial community response to MNPs-rGO exposure in farmland soils. Here, we conducted a soil microcosm experiment to analyze the potential impact of MNPs-rGO on bacterial communities in two field soils via high-throughput sequencing. The change in alpha diversity of bacterial communities was more susceptible to Ag-rGO and ZnO-rGO treatments than CuO-rGO. In both soils, MNPs-rGO significantly changed the bacterial community structure even at a low dose (1 mg kg−1). The bacterial community structure was most strongly affected by Ag-rGO at 30 days, but the greatest changes occurred in ZnO-rGO at 60 days. The differences in soil properties could shape bacterial communities to MNPs-rGO exposure. Distance-based redundancy analysis and functional annotation of prokaryotic taxa showed that some bacterial species associated with nitrogen cycling were greatly influenced by Ag-rGO and ZnO-rGO exposure. In sum, Ag-rGO and ZnO-rGO may potentially affect bacterial communities and nitrogen turnover under long-term realistic field exposure. These findings present a perspective on the response of bacterial communities to MNPs-rGO and provide a fundamental basis for estimating the ecological behavior of MNPs-rGO.

Ultrafine hollow Fe3O4 anode material modified with reduced graphene oxides for high-power lithium-ion batteries

In this work, a composite material consisting of ultrafine Fe3O4 with (ca. 15 nm) uniformly anchored in reduced graphene oxides (rGO) is synthesized and reported to be applied in anodes for lithium-ion battery. The obtained hollow Fe3O4/rGO composites (H-Fe3O4/rGO) (827.3 mA h g−1) has much superior specific capacity than that of the solid Fe3O4/rGO composites (S-Fe3O4/rGO) (654.9 mA h g−1) after 550 cycles of the coin cell at 0.5 A g−1. Even if the cells are tested at 1 A g−1, H-Fe3O4/rGO displays a remarkable specific capacity of 917.4 mA h g−1 as well as the capacity retention rate of 56.7%, compared with S-Fe3O4/rGO (573.9 mA h g−1, the capacity retention rate of 37.7%). Such a sufficient cyclic stability and rate capability in the H-Fe3O4/rGO composite is mainly attributed to the ultrafine hollow structure for shortening Li+ diffusion path and conductive rGO beneficial to rapid electron transfer.

Reduced graphene oxide-supported hollow Co3O4@N-doped porous carbon as peroxymonosulfate activator for sulfamethoxazole degradation

A novel reduced graphene oxide-supported hollow Co3O4@N-doped porous carbon (Co3O4@NPC/rGO) composite was synthesized via self-assembly and pyrolysis-oxidation using bimetallic zeolite imidazolate frameworks and graphene oxide as precursors. The as-obtained composite exhibited superior performance on peroxymonosulfate (PMS) activation over a wide pH range. Complete removal of sulfamethoxazole (SMX, 25 mg·L−1) was achieved within 5 min and the reaction rate constant was higher than those of the most reported heterogeneous catalyst/PMS systems for SMX degradation. It was demonstrated that both radical pathways (SO4−, OH, and O2−) and non-radical pathways (1O2 and direct electron transfer) were involved in the SMX degradation. Significantly, the contribution ratio of each reactive oxidative species (ROS) in the bulk solution or on the catalyst surface was differentiated and calculated for the first time. SO4− both in the bulk solution and on the catalyst surface as well as the 1O2 in the bulk solution were the dominant ROS. The possible degradation mechanism of SMX by Co3O4@NPC/rGO/PMS system was proposed. Co active sites with high activity, the electron-rich ketonic group and the nitrogen doping sites within Co3O4@NPC/rGO contributed to the excellent catalytic activity. The ecotoxicity of SMX and its intermediates was investigated. Besides, the reusability, stability and application potential in actual waterbodies of Co3O4@NPC/rGO were evaluated. Overall, this work expands the environmental application of metal–organic frameworks (MOFs)-derived hollow nanomaterials and provides a promising heterogeneous catalyst for the elimination of refractory contaminants by sulfate radical-based advanced oxidation processes (SR-AOPs).

Self-assembled homogeneous SiOC@C/graphene with three-dimensional lamellar structure enabling improved capacity and rate performances for lithium ion storage

SiOC as an alternative silicon-based material possesses great potential in lithium ion batteries due to its high reversible capacity, tunable chemical component and various synthetic route. However, large-scale production of SiOC powders grinded from SiOC bulks is restricted in commercial application because of the poor electrical conductivity. Herein, three dimensional (3D) lamellar SiOC@C/rGO composite is fabricated through hydrothermal reaction and electrostatic self-assembly process, in which SiOC powders encapsulated by amorphous carbon layers are homogeneously dispersed in graphene sheets. Cfree nanoclusters in SiOC, carbon layers on SiOC surface and graphene supporters in the composite establish the multidimensional interconnected conductive architecture and possess favorable interfacial adhesion. Therefore, SiOC@C/rGO exhibits high specific capacity (676 mAh g−1 at 200 mA g−1) and remarkable rate capability (306.4 mAh g−1 at 4000 mA g−1). The full cell assembled with this anode and LiFePO4 cathode also demonstrates stable voltage platform and good performance for 200 cycles. The excellent performance of SiOC@C/rGO profits from the synergistic effect of robust construction, multidimensional conductive architecture and chemical. CompositionThe proposed strategy can also be developed to prepare other materials with graphene layer to enhance their electrical conductivity for commercial application.